Narrative:

While descending on the Bluzz2 arrival; we were assigned runway 36R. Runway 36L had been loaded into the FMS; so as PF (pilot flying) I reloaded the approach and landing speeds. After hitting 'execute'; the aircraft initiated a 180 degree turn because while loading the approach; we passed the ltown fix. I selected heading on the fcp; selected daple on the FMS; and executed that. I don't know if I selected navigation mode or not; but I suspect I didn't. The aircraft flew on course until clark; at which time it continued on a heading. I noticed we were off course; disengaged the autopilot and turned back to the course. A couple of seconds after that; mem approach gave us a heading of 160; which appeared to be a heading to get us back on course; and 4000 ft. A few seconds after that; the heading was changed to 170. We were vectored the rest of the way to the airport. As PF; I don't think I articulated the FMA calls appropriately; so the pilot monitoring wasn't sure what was happening and so he wasn't able to properly monitor the aircraft course. If I had been more inclusive; this event probably wouldn't have happened. Always call out fcp mode changes and always verify them on the FMA.

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Original NASA ASRS Text

Title: CRJ-900 Captain reported mismanagement of FMS and CRM resulted in being off course.

Narrative: While descending on the Bluzz2 arrival; we were assigned Runway 36R. Runway 36L had been loaded into the FMS; so as PF (Pilot Flying) I reloaded the approach and landing speeds. After hitting 'execute'; the aircraft initiated a 180 degree turn because while loading the approach; we passed the LTOWN fix. I selected heading on the FCP; selected DAPLE on the FMS; and executed that. I don't know if I selected NAV mode or not; but I suspect I didn't. The aircraft flew on course until CLARK; at which time it continued on a heading. I noticed we were off course; disengaged the autopilot and turned back to the course. A couple of seconds after that; MEM Approach gave us a heading of 160; which appeared to be a heading to get us back on course; and 4000 ft. A few seconds after that; the heading was changed to 170. We were vectored the rest of the way to the airport. As PF; I don't think I articulated the FMA calls appropriately; so the pilot monitoring wasn't sure what was happening and so he wasn't able to properly monitor the aircraft course. If I had been more inclusive; this event probably wouldn't have happened. Always call out FCP mode changes and always verify them on the FMA.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.